body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, Segoe UI, Roboto,
    Helvetica Neue, Arial, Noto Sans, sans-serif, Apple Color Emoji,
    Segoe UI Emoji, Segoe UI Symbol, Noto Color Emoji;
  margin: 0;
  overflow-x: hidden;
  overflow-y: scroll;
}

main {
  margin: 0 auto;
  margin-top: 25vh;
  margin-bottom: 2rem;
  padding: 0 1rem;
  max-width: 1280px;
  text-align: center;
}

h1 {
  // 使用全局less变量
  color: $secondary;
}
